2003 AIPMT Principles of Inheritance and VariationLinkage Maps Easy Question 1 of 2 in Linkage Maps

Genetic Map is one that : -

A Establishes sites of the genes on a chromosome
B Establishes the various stages in gene evolution
C Shows the stages during the cell division
D Shows the distribution of various species in a region

The answer is A.

Solution

A genetic (linkage) map shows the relative positions (sites) of genes on a chromosome and the distances between them.
It is prepared from the recombination frequencies between linked genes: 1 percent recombination = 1 map unit (centimorgan). Alfred Sturtevant made the first genetic map in Drosophila.
So a genetic map is one that establishes the sites of the genes on a chromosome.

Concept Genetic map from recombination frequencies

Linkage Maps in past papers

2 questions from this chapter have appeared across 2 exam years.